Self-cleaning type



E. R. HOBBS.

SELF CLEANING TYPE.

APPLICATION FILED FEB- 24. 1920.

PatentedApr. 19,1921;

ELBER'I. It. HOBBS, or cAsrLEronD. IDAFHYO.

SELF-CLEANING TYPE.

Specification of Letters Patent.

Patented Apr. 19, 1921.

Application filed February 24, 1920. Serial No. 360,733.

To all whom. it may concernk Be it known that I, ELBERT B. Home, acitizen of the United States, residing at Castleford, in the county ofTwin Falls, State of Idaho, have invented certain new and usefulImprovements in Self-Cleaning Type, of which the following is aspecification, reference being had therein to the accom anying drawing.

y invention relates to type used for printing, both in press work and intype writers. It has for its object to make the type self cleaning. Iattain this object by providing clear passages or openings eitherthrough the type body or in the sides thereof, which permit particles ofink, paper, dust and the like to pass through, and fall away from theoperative portions of the type.

My invention is illustrated in the accompanying drawings, wherein-Figure 1 is an isometric projection showing a typewriter type headcarrying the letter G in upper and lower case style;

Fig. 2 is aside View of the same;

Fig. 8 is a view similar to Fig. 1 showing modified forms of clearanceopenings in the letter E.

In the drawings, referring especially to- Figs. 1 and 2, 1 is the typebody, 7 the swinging type bar of usual construction, and 2 and 3 are thetype faces of upper case G and lower case g respectively. Each of thesehas openings commencing within the edges of the type face and continuedthrough the body 1 to points of exit in the side or bottom thereof. Thusthe opening 4, tapering into the body, terminates in two exit passages 5and 6 which ass downwardly and discharge through t e back face of thebody 1. The side of the type face is further cleared by providing aninclined channel 8 commencing at the type face and broadening as itstarts downward to discharge through the side of the body. This permitslateral expansion of any mass entering the face, as the inner edge ofchannel 8 is below the face of the type.

The type face 3, on the other hand, has, for illustration, two laterallydischarging openings 11 and 13 into which the type openings 10 and 12merge, as well as a lateral channel 9 similar to the channel 8 and forthe same pur ose.

In Fig. 3, the letter upper case, has two through passages 18 and 19extending to and discharging through the back of the body 1, and alateral channel 21 similar to the channels 8 and 9 already described.The companion type face e, lower case, has a generally circular contour,and it suflices to carry its inner face openings 17 down through asingle tubular discharge passage 20 to the back of body 1. The cross barof the type face thus becomes a bridge, leaving suiiicient space forlateral expansion beneath it without a lateral channel.

What I claim is 1. A type for typewriting machines and the like having abody carrying on its face a printing type and having formed in itselfthrough passages extending from the inner edges of the type face todischarge points on a non-printing surface of the body, said body beingbeveled away from the character edges of the type and all passages orchannels through said body being so constructed as to permit constantexpansion and consequent discharge of any material entering the typeface in use.

2. A type for typewriting machines and the like having a body carryingon its face a printing type and having formed in itself through passagesextending from the inner edges of the type face to discharge points on anon-printing surface of the body, together with a lateral dischargechannel extending from the side of the type face, outside the edgesthereof, said body being beveled away from the character edges of thetype and all passages or channels through said body being so constructedas to permit constant expansion and consequent discharge of any materialentering the type face in use.

3. Atype for typewriting machines and the like having a body carrying onits face a printing type and having formed in itself through passagesextending from the inner edges of the type face to discharge points on anon-printing surface of the body, together with a lateral dischargechannel extending from the side of the'type face, outexpansion andconsequent discharge of any.

side the edges thereof, said lateral channel material entering the typeface in use. -10 being cut down Where it meets the outline of Intestimony whereof I aflix my signature.

5 from the same, said body being beveled away from the character edgesofthe type and. Witnesses: I all passages or channels through said body J.G. STEPHENS, being so constructed as to permit'constant W; G. Amos.

the type face to permit lateral discharge 7 ELBERT R. HOBBS

